Php Basics part 1
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Cookies allow storing and retrieving data on the client-side. Cookies can be set, checked if set, and removed. Cookies are sent with every HTTP request. Sessions allow storing and retrieving data server-side. Session data is accessible across multiple pages and expires when the browser closes. cURL is a tool for transferring data with URLs and supports protocols like HTTP and FTP. It can be used to make requests to other websites or APIs.
![Checking if a Cookie is Set
if (isset($_COOKIE['user'])) { // true, cookie is set
echo 'User is ' . $_COOKIE['user'];
}else { // false, cookie is not set
echo 'User is not logged in';
}](https://image.slidesharecdn.com/php-191011182107/85/Php-Basics-part-1-3-320.jpg)
![Removing a Cookie
setcookie('user', '', time() - 3600, '/');
Or
unset($_COOKIE['user']);](https://image.slidesharecdn.com/php-191011182107/85/Php-Basics-part-1-4-320.jpg)
![Retrieving a Cookie
echo $_COOKIE['user'];](https://image.slidesharecdn.com/php-191011182107/85/Php-Basics-part-1-5-320.jpg)
![• Start session
session_start();
$_SESSION[user'] = ‘gptUser123’;
• Destroying Session
unset($_SESSION['counter']);
session_destroy();](https://image.slidesharecdn.com/php-191011182107/85/Php-Basics-part-1-9-320.jpg)
Php Basics part 1
- 2. Setting a Cookie setcookie("user", "Tom", time() + 86400, "/"); // check syntax for function params • Creates a cookie with name user • (Optional) Value of the cookie is Tom • (Optional) Cookie will expire in 1 day (86400 seconds) (Optional) Cookie is available throughout the whole website / • (Optional) Cookie is only sent over HTTPS • (Optional) Cookie is not accessible to scripting languages such as JavaScript
- 3. Checking if a Cookie is Set if (isset($_COOKIE['user'])) { // true, cookie is set echo 'User is ' . $_COOKIE['user']; }else { // false, cookie is not set echo 'User is not logged in'; }
- 4. Removing a Cookie setcookie('user', '', time() - 3600, '/'); Or unset($_COOKIE['user']);
- 5. Retrieving a Cookie echo $_COOKIE['user'];
- 6. cURL is a tool for transferring data with URL syntax. It support HTTP, FTP, etc
- 7. a little script check is the cURL extension loaded or not if(!extension_loaded("curl")) { die("cURL extension not loaded! Quit Now."); } // Actual script start // create a new cURL resource // $curl is the handle of the resource $curl = curl_init(); // set the URL and other options curl_setopt($curl, CURLOPT_URL,"http://www.example.com"); // execute and pass the result to browser curl_exec($curl); // close the cURL resource curl_close($curl);
- 8. Session data accessible across the various pages of an entire website is to use a PHP Session
- 9. • Start session session_start(); $_SESSION[user'] = ‘gptUser123’; • Destroying Session unset($_SESSION['counter']); session_destroy();
- 10. ? 1. what id diff b/w session and cookie 2. where you use cookie 3. what is the use of session in your web page 4. have you know any cURL equal method